Glass-shearing device.



W. MILLER.

GLASS SHEARINGDEVICE.

APPLlcATloN FILED AUGAO, 1910.

William IMILZLer w.1. MILLER. L

.GLASS SHEARLNG nEwcL. Y l APPLICATION FILED AUG. l0, T910 1,176,392.VPatented Mar. 21, 1916...

2 SHEETS-SHEET 2.

STATES PATENT FFTCE.

WILLIAM J'. vMILLER, OF COLUMBUS, OHIO.

' GLASS-SHEABING DEVICE.

Specication of Letters Patent.

' Application filed August 10, 1910. Serial No. 576,531.

chines for severing the string of a lump of hot glass when the lump hasbeen deposited by a punty into the mold.

The invention is embodied in the construction herein shown, described,and claimed, the invention not being confined to the particular instanceof it illustrated in the accompanying drawings.

In said drawings-Figure l is a plan view. Fig. 2 is a vertical sectionon the line mm Fig. 1. Fig. 3 is a transverse vertical section on theline y-fz/ Fig. 2. Fig. 4 is a similar section on the line e-ez Fig. 2.Fig. 5 is a side elevation. Fig. 6 is a transverse vertical section onthe line fw-fw Fig.

7 is a similar 5 looking to the right. Fig.

line w-fw F ig.'5, looksection on the same ing to the left.

The frame upon which the shearing blades are supported or are -operatedcomprises a portion including a cylinder 15 and a portion 16 secured tothe cylinder and forming the outer head thereof. Within the cylinder isa piston 17 having its rod 18 extended through a stuffing box in theouter head of the cvlinder. On the outer end of the piston rod issecured a cross head of metal 19 constituting the stock for receivingthe shearing blade 20. This blade 20 has a. concavedly curved shearingedge as shown and is secured to the lower side of the cross head bymeans of a clip or platel 21 engaged by headed screws 22, 22. passedthrough the cross head. Threading into the cross head between the screws22, 22, is a screw 23. the lower end of which is butted against theupper side of the blade at a middle line thereof. B v turning down thescrew 23 to the extent desired and tightening up the screws 22. 22, todraw up the clip and sides of the blade the shearing edge thereof can beflexed to the extent desired with a downward curve from the sides towardthe middle. At the flanks of the of which the following is a speci crosshead are forwardly projecting spring Patented Mar. 21, 1916.

presser members 24, 24, the function of 1 which will presently appear.These spring members 24, 24, are secured by means of set screws 25, 2 5,threaded through the flanks f the cross head and through holes in thespring members and pinching .against the side portions of the clip 21.The screws 25 are held in their set position by lock nuts 26. The springmembers 24, 24, are of course, clamped and held from vertical movementbetween. the cross head and clip 2lwhen the latter is drawn up to flexthe blade, and the screw 25, because it passes through a hole in therear end of the blade, aids in securing it from longitudinal movement.

27 designates the stationary shearing blade. This blade also has aconcavedly curved shearing edge the curve thereof being the contrary ofthat of its movable companion' and said blade is secured upon theforward portion 16 of the frame by means of a clipor plate 28 held uponthe blade with screws 29, 29, tapping into the frame. Extending upwardfrom the lower side of the frame and between the screws 29, 29, is ascrew 30 having its upper end butting against the under side of saidblade at the middle line of the latter. By turning up the screw 30 tothe extent desired and tightening down the screws 29 the shearing edgeof the blade ,27 can be fiexed to the extent desired. The clips orplates 21 and 28 while thicker than the blades are suliciently thin tobe flexible when subjected at their ends to the pressure of the screwsand" their flection is imparted to the blades. The flection of theplates and blades i`s so slight that it cannot be exactly shown indrawings l upon the scale necessary herein. The under sides of the endsof the plate 28 are cut away and the forward ends of thespring pressermembers 24, 24, are beveled as seen at 24a,

vso that when the cross head carrying the two points, When the twoblades first conl tact a lenticular opening between them is formed, saidopening decreasing in'its ma-v jor and minor axes as the movable bladeadvances over the fixed one. Because the shearing contacts of -theblades approach Aeach other through the glass the latter is glass isdeposited by the punty to the mold.

Where my shearlng device is to be used in connection with a glassmolding machine like that illustrated in the United States patent toEdward Miller, No. 787,050 dated April 11, 1905, it is secured to thecolumn or post 1 of such machine and substantially in the same manner asshown in my United States Patent No. 937,626 dated October 19, 1909.

The piston can be reciprocated by fluid pressure to operate the crosshead and movable blade in thezusual manner and substan-l tially asindicated in my aforesaid patent. It is advantageous and prefer'red thatthe system of valves of my said patent be used especially where theinvention isv applied to such machine. The movable blade passes aboveand hard against the vstationary blade, their edges being forcedtogether by the spring pressure members bearing upward against the endsof the clip of the statlonary blade. Before the fluid pressure isadmitted to force outward the cross head the gatherer drops a lump ofglass through the funnel shaped opening described and the string ofglass between the punty and the lump in the mold below is sheared andsevered by depressing the necessary valve to move the piston. To openthe shears the pressure is, of course, admitted to the Cylinder at theopposite side of the piston when the operation of shearing can berepeated.

It will be observed that ,with this construction the use of links andother expensive or troublesome parts and connections therefor areavoided. By adjusting the screws 23 and 30 or either of them theshearing blades can beflexed to secure that relat1ve posltlon of themnecessary to effect a clean cut. Because the screws 25 are in rear ofthe sc rews 22, the knife, and the springs can be given a slightadjustment with reference to the cross-head upward or downward1,17e,seaf

by properly turning down or up the screws 25.

Portions of this invention can obviously V 3. Means for shearing glassincluding, in

combination, two blades at least one of which has a concavedly curvedshearing edge and adjustable means for flexing each ofvsaid blades.

4. Means for shearing glass including, in combination, two blades atleast one of which -has a concavedly curved shearing edge and adjustablemeans for flexing at least one of said blades.

5. Means for shearing glass comprising, in combination, a pair ofblades, one of which moves to coperate with the other, a pair of springmembers anking one of said blades and a pair of coperating contacts forsaid spring members flanking the other blade, said spring members andcontacts adaptedl to guide and hold said blades in shearing relation toeach other.

6. In means for shearing glass, in combination, a support, a bladehaving a concavedly curved shearing edge on said support, a clip on oneface of the blade with screws to secure the blade to the support, a setscrew in the support between the first mentioned screws to bear upon theface of the blade opposite that engaged by said clip to flex the bladeand its shearing edge.

WILLIAM J. MILLER.

Witnesses:

BENJAMIN FINCKEL, MAYME FOARD.

